Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	May 26, 2017	Feb. 24, 2017
Statement of Financial Position [Abstract]
Accounts receivable, allowances	$ 11.5	$ 11.2
Property, plant and equipment, accumulated depreciation	982.7	959.6
Other intangible assets, accumulated amortization	$ 44.2	$ 43.2